Show-case lock.



L. H. SGHMID'IZ;

SHOW CASE LOOK.

APPLICATION FILED JULY 23, 1909.

957,803 Patented May 10, 1910.

lll

LEO H. SCHMIDT, 0F VALE, OREGON.

SHOW-CASE LOCK.

Specification of Letters Patent.

Patented May 110, 1910.

Application filed July 23, 1909. Serial No. 509,161.

To all whom it may concern:

Be it known that I Leo H. SoI-IMIn'r, a citizen of the United states, and a resident of Vale, in the county of Malheur, State of Oregon, have invented certain new and useful Improvements in Show-Case Locks, of which the following is a specification.

This invention relates broadly to key operated locks and specifically to key operated locks for closing sliding doors, particularly doors which are adapted to be slid one beyond the other in different planes of movement.

The object of the invention is to provide a lock for sliding doors of a show case, or cabinet.

' A further object of the invention is to provide a locking means for show case sliding doors, that will be entlrely out of operation and capable of being removed from the show case when the doors are unlocked.

Another object of the invention is to construct a simple combination of a lock and bolt such that the lock is automatically operated when the bolt is pressed into position.

As this device is capable of many different constructions, without departing from the scope of my invention, I desire that the drawings which form a part of this specification be considered as illustrative and not in a limiting sense.

The same characters, used as reference numerals, indicate like parts throughout the several figures in the drawings, in which:

Figure 1 shows the lock in operative osition. Fig. 2 is a perspective view 0' the members disengaged. Fig. 3 shows casing broken away to expose locking mechanism. Fig. 4 is a section on line AA of Fig. 3. Fig. 5 is a bottom view of the lock bolt. Fig. 6 shows lock as applied to a show case.

This invention is intended particularly to provide a positive lock, for the sliding doors of a. show case, which may be used to prevent the doors from being opened by unauthorized persons during the absence of the proprietors. During the busy hours of the day when the doors are being opened and closed frequently the lock bolt is adapted to be entirely removed from the door and may be placed on the inside of the show case or in any other convenient place.

Referring to the drawings, a lock casing 1, is integral with the locking bolt 2. A keeper 3, carrying integral therewith a catch frame 4, is adapted to be permanently fastened to a sliding door frame 5, by means of wood screws 6 or any other suitable fastening devices. The casing 1 is formed with an integral top, and a base. The base, which is open in order to admit the locking mechanism, is closed by a back plate 7. This back plate is secured to the casing 1, by means of screws 8 engaging the lugs 9, which are a part of the casing 1 and against which lugs the back plate 7 is adapted to rest. Carried upon standards 10 and 11, on the back plate 7 is a latch 12. A compression spring 13 surrounds the latch 12, and engaging the standard 10 and the collar 14' on the latch 12, forces the latch outward until the pin 15 is stopped by the standard 11, thus limiting the outward movement of the latch 12. The outer end of the latch is beveled as at 16, in order to cooperate with the beveled portion 17 of the catch frame 4. The latch member 12 is provided with a key notch 18 formed between the projection 19 and the collar 14. In order to accurately position a key as it is inserted through a key hole 20, in the casing 1, a key post 26 is carried by the back plate 7.

The operation of the lock is as follows The doors are slid into closed position, o until the circular opening 21, in the outer door 5 coincides with a similar opening 22 in the inner door 23. The locking bolt 2 is inserted in the opening 21 and pushed inward. As the bolt 2 passes into the opening 22, in the inner door, the beveled face 17 of the catch frame 4 engages the beveled face 16 of the latch member 12. A further insertion of the bolt 2 causes the latch 12 to compress the spring 13 until the end of the latch 12 passes over the face of the catch 4. When the bolt 2 is forced inward until the back plate 7 rests against the keeper 3, the spring 13 forces the latch 12 into the opening 25 of the catch, thus securely locking the casing 1 and bolt 2 in position and against movement in any direction. While the parts are in this position it will be impossible to open either of the doors 5 or 23 of show case 24, without withdrawing the bolt by means of a key inserted through the key hole 20, or without breaking the lock, Thus it will be seen the device provides a simple and eifectual means of locking the case against being opened by unauthorized parties. 1

To remove the bolt, a key is inserted in the key hole 20, and turned against the spring 13, thus forcing the latch backward until it clears the hasp 4, when the bolt 2 may be Withdrawn.

Having thus described the device What I claim as my invention is 1. In a device of the class described in combination, a locking bolt, a lock casing integral With said bolt, a latch carried by said casing, and a catch With Which said latch is adapted to cooperate, substantially as described.

' 2. In a device of the class described in combination, a locking bolt, a latch casing, a back plate carried by said casing, a latch on said back plate, a spring on said latch, and a catch adapted to cooperate With said latch, substantially as described.

3. In a device of the class described in combination, a locking bolt, a casing, a latch carried by said casing, a spring cooperating with said latch, and a catch adapted to be engaged by said latch, substantially as describe 4c. In combination with sliding doors, a bolt passing through said doors, a lock casing integral with said bolt, latch mechanism carried in said casing, a catch carried by one of said doors, said latch mechanism being adapted to engage said catch When the bolt is in position in said doors, substantially as described.

LEO I-I. SCHMIDT.

Witnesses S'roWELL L. PAYNE, WILLIAM M. JACOBS. 

